Function and Application
The NJR5-ZX series soft starter is an on-line soft starter, with input power supply voltages (main circuit voltage) of AC220V, AC380V, AC460V, AC575V, and AC690V, and rated current specifications ranging from 15A to 1000A. It has strong load adaptability, stable operation, and reliability, and is widely used in motor drive equipment in fields such as metallurgy, oil, fire protection, mining, water supply, municipal, food, cement, and petrochemical industries. It is the ideal replacement product for traditional star-delta starting and autotransformer voltage reduction starting. The NJR5-ZX series soft starter is an AC induction motor soft starter that integrates power electronics technology, microprocessor technology, and modern control theory. It controls the three-phase reverse-parallel thyristors connected between the power supply and the controlled motor to realize functions such as soft starting and soft stopping of three-phase AC induction motors. This product can effectively control the starting current and starting torque of three-phase induction motors (hereinafter referred to as motors) and can be widely applied to fans, pumps, compressors, ball mills, crushers, and other loads. The product complies with the standards: GB/T 14048.6, IEC 60947-4-2.
Detailed Description
Parameters:
Starting mode: 7 types
Voltage specifications: 5 types
Failure records: 10 times
Maximum rated current: 1000A
Advantages/Core Functions:
01 Rich functions
Seven starting modes are available, providing better equipment starting performance
Secondary current limiting function, reliable starting even for heavy loads
02 Convenient and easy to use
No bypass contactor required, reducing application costs
LCD Chinese/English display panel, making debugging more convenient
03 Energy saving and prolonging service life
Light load automatic energy saving function, energy saving and prolonging service life
Soft start and stop, extending the service life of the equipment
Detailed Parameters
| Parameter Category | Parameter Item | Parameter Value |
|---|
| 4.1 Power Supply Voltage | 1) NJR5- □ /ZX2: | AC220V (range: AC198V~AC264V); |
| 2) NJR5- □ /ZX3: | AC380V (range: AC323V~AC437V); |
| 3) NJR5- □ /ZX4: | AC460V (range: AC414V~AC504V); |
| 4) NJR5- □ /ZX5: | AC575V (range: AC517V~AC633V); |
| 5) NJR5- □ /ZX6: | AC690V (range: AC621V~AC759V). |
| 4.2 Main Power Frequency | | 50Hz±1.5Hz, 60Hz±1.8Hz. |
| 4.3 Applicable Motor | | Standard squirrel-cage three-phase induction motor. |
| 4.4 Pollution Level | | Level 3. |
| 4.5 Rated Insulation Voltage | 1) NJR5- □ /ZX2 and NJR5- □ /ZX3: | AC660V; |
| 2) NJR5- □ /ZX4, NJR5- □ /ZX5, NJR5- □ /ZX6: | AC1000V. |
| 4.6 Rated Impulse Withstand Voltage | | 8kV. |
| 4.7 Cooling Method | | Forced air cooling. |
| 4.8 Starting Frequency | | Starting frequency per hour can be set, it is recommended not to exceed 10 times per hour, the heavier the load, the lower the starting frequency should be. |
| 4.9 Soft Start Time Factor | | (2~60)s. |
| 4.10 Soft Stop Time Factor | | (2~60)s. |
| 4.11 Starting Mode | | Conventional current mode, enhanced current mode, conventional voltage mode, enhanced voltage mode, linear torque mode, square torque mode, and frequency division mode, a total of 6 types. |
| 4.12 Stopping Mode | | Free stop, braking stop, and voltage ramp soft stop, a total of 3 types. |
| 4.13 Initial Voltage | | (30~70)%Ue, where Ue represents the power supply voltage. |
| 4.14 Jump Time | | (0.0~2.0)s. |
| 4.15 Jump Voltage | | (50~100)%Ue, where Ue represents the power supply voltage. |
| 4.16 Current Limit Multiplier | | (50~500)%le, where le represents the motor rated current. |
| 4.17 Torque Limit Level | | (50.0~300.0)%Te, where Te represents the motor rated torque. |
| Parameter Category | Parameter Item | Parameter Value |
| 5.1 Performance Aspects | ● 6 Starting Modes: | They are conventional current mode, enhanced current mode, conventional voltage mode, enhanced voltage mode, linear torque mode, square torque mode, and frequency division mode. By selecting different starting modes and starting parameters based on load characteristics, the motor can achieve the best starting performance. |
| ● Smooth Jump Starting: | When switching from the jump process to the normal starting mode, the current achieves seamless smooth connection without sudden changes, thus extending the service life of the transmission equipment. |
| ● Torque Control Mode Available: | Real-time control of the output electromagnetic torque of the soft starter, allowing the motor to increase speed more smoothly during the soft starting process. |
| ● Energy Saving Function Available: | When the energy saving mode is selected, if the motor is detected to be in a light load operating state, the output voltage of the soft starter is appropriately reduced, causing the motor's magnetic flux to decrease and the excitation current to decrease. |
